282 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



aeneous tinge ; pronotum and elytra piceous, with a cupreous or aene- 

 ous reflection, and the elytra ornamented with more or less distinct 

 pubescent spots; beneath brownish cupreous, and more shining than 

 above. 



Head with the front rather wide, moderately convex, wider at 

 bottom than at top, the lateral margins vaguely expanded at middle, 

 and with a narrow, vague, longitudinal groove extending from occi- 

 put to middle of front ; surface sparsely, coarsely punctate, coarsely, 

 irregularly rugose, the rugae becoming longitudinal on the occiput, 

 and sparsely clothed with short, recumbent, silvery white pubescence ; 

 epistoma transverse between the antennae, and broadly but not 

 deeply, arcuately emarginate in front ; antennae extending to middle 

 of pronotum, serrate from the fifth joint, and the outer joints slightly 

 wider than long; eyes large, broadly oval, and slightly more acutely 

 rounded beneath than above. 



Pronotum one-fourth wider than long, slightly narrower at base 

 than apex, and widest at middle, sides arcuately rounded from apical 

 angles to behind middle, then more strongly narrowed to near the 

 posterior angles, where they are more or less sinuate, and the angles 

 rectangular; when viewed from the side the marginal carina is 

 strongly sinuate, the submarginal carina feebly sinuate, the two 

 carinae widely separated anteriorly, and connected to each other near 

 the base; anterior margin strongly sinuate, and the median lobe 

 strongly, broadly rounded ; base slightly emarginate at middle of 

 each elytron, the median lobe feebly, broadly rounded, and broadly 

 emarginate in front of scutellum; disk moderately convex, with a 

 broad, moderately deep median depression extending from base to 

 near anterior margin, a broad, deep, oblique depression on each side 

 along lateral margin, and with sharply defined, arcuate prehumeral 

 carinae extending from base to near middle; surface obsoletely 

 granulose, coarsely, strongly, transversely rugose, sparsely, finely 

 punctate between the rugae, and sparsely clothed with short, incon- 

 spicuous, white hairs toward the sides. Scutellum strongly, trans- 

 versely carinate, and the surface densely, finely reticulate. 



Elytra wider than pronotum at base, and about equal in width at 

 base and near apical third ; sides nearly parallel for a short distance 

 behind base, broadly, arcuately constricted in front of middle, 

 broadly, arcuately expanded behind the middle, then obliquely nar- 

 rowed to the tips, which are separately, broadly rounded, and strongly 

 serrulate; sides of abdomen broadly exposed above; disk slightly 

 longitudinally concave along the sutural margins, which are strongly 

 elevated from basal fourth to apex, a broad vague costa at outer 

 margin of concavity, and with broad, deep basal depressions; sur- 

 face coarsely, densely imbricate-punctate, and each elytron orna- 



